Sahih al-Bukhari Book 78, Hadith 37
The Prophet (ﷺ) said "The one who looks after and works for a widow and for a poor person, is like a
warrior fighting for Allah's Cause or like a person who fasts during the day and prays all the night."
Narrated Abu Huraira that the Prophet (ﷺ) said as above.
The Prophet (ﷺ) said, "I and the person who looks after an orphan and provides for him, will be in Paradise like this," putting his index and middle fingers together.
Allah's Messenger (ﷺ) said, "The one who looks after and works for a widow and for a poor person is like a warrior fighting for Allah's Cause." (The narrator Al-Qa'nabi is not sure whether he also said "Like the one who prays all the night without slackness and fasts continuously and never breaks his fast.")